Signal-switching circuit, signal-switching method, and user equipment

Abstract

Embodiments of the present disclosure provide a signal-switching circuit, a signal-switching method, and a user equipment. The signal-switching circuit includes: a first electrical connector used for connecting with a second electrical connector, wherein the second electrical connector is used for providing a first group of signal terminals; a signal processing circuit used for providing a second group of signal terminals, wherein the first group of signal terminals is different from the second group of signal terminals, and the second electrical connector and the signal processing circuit are connected to different grounding points isolated from each other; a connection detection circuit used for detecting whether the first electrical connector is connected with the second electrical connector; and a control unit used for causing the signal processing circuit to stop transmitting signals with the second group of signal terminals in a case of detecting that the first electrical connector is connected with the second electrical connector; wherein the signal-switching circuit is configured to connect the first group of signal terminals or the second group of signal terminals to an electronic device. The signal-switching circuit of the present disclosure can realize signal switching at a low cost and prevent electromagnetic interference.

1 . A signal-switching circuit comprising:
 a first electrical connector used for connecting with a second electrical connector, wherein the second electrical connector is used for providing a first group of signal terminals;   a signal processing circuit used for providing a second group of signal terminals, wherein the first group of signal terminals is different from the second group of signal terminals, and the second electrical connector and the signal processing circuit are connected to different grounding points isolated from each other;   a connection detection circuit used for detecting whether the first electrical connector is connected with the second electrical connector; and   a control unit used for causing the signal processing circuit to stop transmitting signals with the second group of signal terminals in a case of detecting that the first electrical connector is connected with the second electrical connector;   wherein the signal-switching circuit is configured to connect the first group of signal terminals to an electronic device in a case where the first electrical connector is connected with the second electrical connector; and connect the second group of signal terminals to the electronic device in a case where the first electrical connector is not connected with the second electrical connector.   
     
     
         2 . The signal-switching circuit according to  claim 1 , wherein the electronic device operates in a first mode when the first electrical connector is connected with the second electrical connector, and operates in a second mode when the first electrical connector is not connected with the second electrical connector. 
     
     
         3 . The signal-switching circuit according to  claim 2 , wherein the first mode is a wired working mode, and the second mode is a wireless working mode, the wireless working mode comprises at least one of a radio wave working mode, a Bluetooth working mode, and an infrared working mode. 
     
     
         4 . The signal-switching circuit according to  claim 1 , wherein the electronic device comprises at least two sub-devices; the control unit is further configured to output a switching enable signal in a case of detecting that the first electrical connector is connected with the second electrical connector;
 wherein the signal-switching circuit further comprises:   a switching circuit configured to connect some of the first group of the signal terminals to at least some of the at least two sub-devices, in response to the switching enable signal received from the control unit.   
     
     
         5 . The signal-switching circuit of  claim 4 , wherein the first group of signal terminals comprises a first group of positive signal terminals and a first group of negative signal terminals, the second group of signal terminals comprises a second group of positive signal terminals and a second group of negative signal terminals;
 wherein the first electrical connector is used for switching the positive signal terminals of the at least two sub-devices to the first group of positive signal terminals or the second group of positive signal terminals, and the switching circuit is used for switching the negative signal terminals of at least some of the at least two sub-devices to the first group of negative signal terminals or the second group of negative signal terminals; or   the first electrical connector is used for switching the negative signal terminals of the at least two sub-devices to the first group of negative signal terminals or the second group of negative signal terminals, and the switching circuit is used for switching the positive signal terminals of at least some of the at least two sub-devices to the first group of positive signal terminals or the second group of positive signal terminals.   
     
     
         6 . The signal-switching circuit according to  claim 5 , wherein in the case where the first electrical connector is used for switching the positive signal terminals of the at least two sub-devices to the first group of positive signal terminals or the second group of positive signal terminals, and the switching circuit is used for switching the negative signal terminals of at least some of the at least two sub-devices to the first group of negative signal terminals or the second group of negative signal terminals,
 connecting the first group of signal terminals to an electronic device comprises:   connecting the first group of positive signal terminals to the positive signal terminals of the at least two sub-devices respectively by using the contacts of the first electrical connector; and   connecting the first group of negative signal terminals to the negative signal terminals of the at least two sub-devices respectively by using the switching circuit; or connecting the first negative signal terminal in the first group of negative signal terminals to the negative signal terminal of the first sub-device in the at least two sub-devices by using the contacts of the first electrical connector, and connecting other negative signal terminals than the first negative signal terminal in the first group of negative signal terminals to the negative signal terminals of other sub-devices than the first sub-device among the at least two sub-devices respectively by using the switching circuit;   connecting the second group of signal terminals to an electronic device comprises:   connecting the second group of positive signal terminals to the positive signal terminals of the at least two sub-devices respectively by using the contacts of the first electrical connector; and   directly connecting the second group of negative signal terminals to the negative signal terminals of the at least two sub-devices respectively, or connecting the second group of negative signal terminals to the negative signal terminals of the at least two sub-devices respectively by using the switching circuit.   
     
     
         7 . The signal-switching circuit according to  claim 6 , wherein the switching circuit comprises transistors,
 wherein the switching circuit turns on the transistors based on the switching enable signal to connect the first group of negative signal terminals to the negative signal terminals of the at least two sub-devices respectively, or connect other negative signal terminals than the first negative signal terminal in the first group of negative signal terminals to the negative signal terminals of other sub-devices than the first sub-device among the at least two sub-devices respectively.   
     
     
         8 . The signal-switching circuit according to  claim 7 , wherein the transistors comprise a first transistor, a second transistor, and a third transistor,
 wherein a control electrode of the first transistor receives the switching enable signal, a first electrode of the first transistor is grounded, a second electrode of the first transistor receives a high-level signal via a resistor, a control electrode of the second transistor and a control electrode of the third transistor are respectively connected to the second electrode of the first transistor, a second electrode of the second transistor is connected to a second electrode of the third transistor, a first electrode of the second transistor is connected to other negative signal terminals than the first negative signal terminal in the first group of negative signal terminals, and a first electrode of the third transistor is connected to the negative signal terminals of other sub-devices than the first sub-device among the at least two sub-devices,   wherein in a case of detecting that the first electrical connector is connected with the second electrical connector, the control unit outputs a low-level switching enable signal, so that the first electrode of the first transistor outputs a high-level signal, the second transistor and the third transistor are turned on to connect other negative signal terminals than the first negative signal terminal in the first group of negative signal terminals to the negative signal terminals of other sub-devices than the first sub-device among the at least two sub-devices respectively.   
     
     
         9 . A signal-switching method, comprising:
 in a case of detecting that a first electrical connector is connected with a second electrical connector, connecting a first group of signal terminals to an electronic device and causing a signal processing circuit to stop transmitting signals with a second group of signal terminals, wherein the second electrical connector is used for providing the first group of signal terminals, and the signal processing circuit is used for providing the second group of signal terminals; and   in a case of detecting that the first electrical connector is not connected with the second electrical connector, connecting the second group of signal terminals to the electronic device, wherein the first group of signal terminals are different from the second group of signal terminals, and the second electrical connector and the signal processing circuit are connected to different grounding points isolated from each other.   
     
     
         10 . A user equipment comprising a signal-switching circuit and an electronic device,
 wherein, the signal-switching circuit comprises:   a first electrical connector used for connecting with a second electrical connector, wherein the second electrical connector is used for providing a first group of signal terminals;   a signal processing circuit used for providing a second group of signal terminals, wherein the first group of signal terminals is different from the second group of signal terminals, and the second electrical connector and the signal processing circuit are connected to different grounding points isolated from each other;   a connection detection circuit used for detecting whether the first electrical connector is connected with the second electrical connector; and   a control unit used for causing the signal processing circuit to stop transmitting signals with the second group of signal terminals in a case of detecting that the first electrical connector is connected with the second electrical connector;   wherein the signal-switching circuit is configured to connect the first group of signal terminals to an electronic device in a case where the first electrical connector is connected with the second electrical connector; and connect the second group of signal terminals to the electronic device in a case where the first electrical connector is not connected with the second electrical connector.